blob: 14ae4b8e1a3ce8370b282503c91a1ff428d61f5b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/cifsfs.c
3 *
Steve French2b280fa2008-05-17 03:12:45 +00004 * Copyright (C) International Business Machines Corp., 2002,2008
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * Common Internet FileSystem (CIFS) client
8 *
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24/* Note that BB means BUGBUG (ie something to fix eventually) */
25
26#include <linux/module.h>
27#include <linux/fs.h>
28#include <linux/mount.h>
29#include <linux/slab.h>
30#include <linux/init.h>
31#include <linux/list.h>
32#include <linux/seq_file.h>
33#include <linux/vfs.h>
34#include <linux/mempool.h>
Steve French6ab16d22005-11-29 20:55:11 -080035#include <linux/delay.h>
Steve French45af7a02006-04-21 22:52:25 +000036#include <linux/kthread.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080037#include <linux/freezer.h>
Al Virofec11dd2011-07-18 13:50:40 -040038#include <linux/namei.h>
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -070039#include <linux/random.h>
Andreas Gruenbachera9ae0082016-04-22 12:11:38 +020040#include <linux/xattr.h>
Ben Greear3eb9a882010-09-01 17:06:02 -070041#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include "cifsfs.h"
43#include "cifspdu.h"
44#define DECLARE_GLOBALS_HERE
45#include "cifsglob.h"
46#include "cifsproto.h"
47#include "cifs_debug.h"
48#include "cifs_fs_sb.h"
49#include <linux/mm.h>
Jeff Layton84a15b92007-11-03 05:02:24 +000050#include <linux/key-type.h>
Jeff Laytone5459372007-11-03 05:11:06 +000051#include "cifs_spnego.h"
Suresh Jayaramanf579cf32010-07-05 18:11:50 +053052#include "fscache.h"
Pavel Shilovsky3792c172012-01-12 22:40:50 +040053#ifdef CONFIG_CIFS_SMB2
54#include "smb2pdu.h"
55#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Linus Torvalds1da177e2005-04-16 15:20:36 -070057int cifsFYI = 0;
Kees Cook14042972016-03-17 14:22:54 -070058bool traceSMB;
Steve Frenche7504732011-10-12 17:47:03 -050059bool enable_oplocks = true;
Kees Cook14042972016-03-17 14:22:54 -070060bool linuxExtEnabled = true;
61bool lookupCacheEnabled = true;
Jeff Layton04912d62010-04-24 07:57:45 -040062unsigned int global_secflags = CIFSSEC_DEF;
Steve French39798772006-05-31 22:40:51 +000063/* unsigned int ntlmv2_support = 0; */
Linus Torvalds1da177e2005-04-16 15:20:36 -070064unsigned int sign_CIFS_PDUs = 1;
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -080065static const struct super_operations cifs_super_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
Jeff Layton60654ce2012-11-25 08:00:34 -050067module_param(CIFSMaxBufSize, uint, 0);
Steve French63135e02007-07-17 17:34:02 +000068MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
69 "Default: 16384 Range: 8192 to 130048");
Linus Torvalds1da177e2005-04-16 15:20:36 -070070unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
Jeff Layton60654ce2012-11-25 08:00:34 -050071module_param(cifs_min_rcv, uint, 0);
Steve French63135e02007-07-17 17:34:02 +000072MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
73 "1 to 64");
Linus Torvalds1da177e2005-04-16 15:20:36 -070074unsigned int cifs_min_small = 30;
Jeff Layton60654ce2012-11-25 08:00:34 -050075module_param(cifs_min_small, uint, 0);
Steve French63135e02007-07-17 17:34:02 +000076MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
77 "Range: 2 to 256");
Linus Torvalds1da177e2005-04-16 15:20:36 -070078unsigned int cifs_max_pending = CIFS_MAX_REQ;
Jeff Layton60654ce2012-11-25 08:00:34 -050079module_param(cifs_max_pending, uint, 0444);
Steve French63135e02007-07-17 17:34:02 +000080MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
Pavel Shilovsky10b9b982012-03-20 12:55:09 +030081 "Default: 32767 Range: 2 to 32767.");
Steve Frenche7504732011-10-12 17:47:03 -050082module_param(enable_oplocks, bool, 0644);
Jeff Layton60654ce2012-11-25 08:00:34 -050083MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
Steve Frenche7504732011-10-12 17:47:03 -050084
Linus Torvalds1da177e2005-04-16 15:20:36 -070085extern mempool_t *cifs_sm_req_poolp;
86extern mempool_t *cifs_req_poolp;
87extern mempool_t *cifs_mid_poolp;
88
Jeff Laytonda472fc2012-03-23 14:40:53 -040089struct workqueue_struct *cifsiod_wq;
Jeff Layton3d224622016-05-24 06:27:44 -040090__u32 cifs_lock_secret;
Jeff Laytonda472fc2012-03-23 14:40:53 -040091
Mateusz Guzik24261fc2013-03-08 16:30:03 +010092/*
93 * Bumps refcount for cifs super block.
94 * Note that it should be only called if a referece to VFS super block is
95 * already held, e.g. in open-type syscalls context. Otherwise it can race with
96 * atomic_dec_and_test in deactivate_locked_super.
97 */
98void
99cifs_sb_active(struct super_block *sb)
100{
101 struct cifs_sb_info *server = CIFS_SB(sb);
102
103 if (atomic_inc_return(&server->active) == 1)
104 atomic_inc(&sb->s_active);
105}
106
107void
108cifs_sb_deactive(struct super_block *sb)
109{
110 struct cifs_sb_info *server = CIFS_SB(sb);
111
112 if (atomic_dec_and_test(&server->active))
113 deactivate_super(sb);
114}
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116static int
Al Viro97d11522011-06-17 09:29:57 -0400117cifs_read_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118{
119 struct inode *inode;
Pavel Shilovskyb2e5cd32011-05-25 13:35:34 +0400120 struct cifs_sb_info *cifs_sb;
Jan Klos2f6c9472013-10-06 21:08:20 +0200121 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 int rc = 0;
Steve French50c2f752007-07-13 00:33:32 +0000123
Pavel Shilovskyb2e5cd32011-05-25 13:35:34 +0400124 cifs_sb = CIFS_SB(sb);
Jan Klos2f6c9472013-10-06 21:08:20 +0200125 tcon = cifs_sb_master_tcon(cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Al Viro2c6292a2011-06-17 09:05:48 -0400127 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
128 sb->s_flags |= MS_POSIXACL;
129
Jan Klos2f6c9472013-10-06 21:08:20 +0200130 if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
Al Viro2c6292a2011-06-17 09:05:48 -0400131 sb->s_maxbytes = MAX_LFS_FILESIZE;
132 else
133 sb->s_maxbytes = MAX_NON_LFS;
134
135 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
136 sb->s_time_gran = 100;
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 sb->s_magic = CIFS_MAGIC_NUMBER;
139 sb->s_op = &cifs_super_ops;
Andreas Gruenbachera9ae0082016-04-22 12:11:38 +0200140 sb->s_xattr = cifs_xattr_handlers;
Jens Axboe8044f7f2010-04-22 12:09:48 +0200141 sb->s_bdi = &cifs_sb->bdi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 sb->s_blocksize = CIFS_MAX_MSGSIZE;
143 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
Shirish Pargaonkar9b6763e2011-02-21 23:56:59 -0600144 inode = cifs_root_iget(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
David Howellsce634ab2008-02-07 00:15:33 -0800146 if (IS_ERR(inode)) {
147 rc = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 goto out_no_root;
149 }
150
Jan Klos2f6c9472013-10-06 21:08:20 +0200151 if (tcon->nocase)
Jeff Layton66ffd112013-07-30 11:38:44 -0400152 sb->s_d_op = &cifs_ci_dentry_ops;
153 else
154 sb->s_d_op = &cifs_dentry_ops;
155
Al Viro48fde702012-01-08 22:15:13 -0500156 sb->s_root = d_make_root(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 if (!sb->s_root) {
158 rc = -ENOMEM;
159 goto out_no_root;
160 }
Steve French50c2f752007-07-13 00:33:32 +0000161
Paul Bollef3a6a602011-10-12 14:14:04 +0200162#ifdef CONFIG_CIFS_NFSD_EXPORT
Steve French7521a3c2007-07-11 18:30:34 +0000163 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500164 cifs_dbg(FYI, "export ops supported\n");
Steve French7521a3c2007-07-11 18:30:34 +0000165 sb->s_export_op = &cifs_export_ops;
166 }
Paul Bollef3a6a602011-10-12 14:14:04 +0200167#endif /* CONFIG_CIFS_NFSD_EXPORT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169 return 0;
170
171out_no_root:
Joe Perchesf96637b2013-05-04 22:12:25 -0500172 cifs_dbg(VFS, "%s: get root inode failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 return rc;
174}
175
Al Viro6d686172011-06-17 08:34:57 -0400176static void cifs_kill_sb(struct super_block *sb)
177{
178 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
179 kill_anon_super(sb);
Al Viro98ab4942011-06-17 09:32:10 -0400180 cifs_umount(cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181}
182
183static int
David Howells726c3342006-06-23 02:02:58 -0700184cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185{
David Howells726c3342006-06-23 02:02:58 -0700186 struct super_block *sb = dentry->d_sb;
Steve French39da9842008-04-28 04:04:34 +0000187 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French96daf2b2011-05-27 04:34:02 +0000188 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700189 struct TCP_Server_Info *server = tcon->ses->server;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400190 unsigned int xid;
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700191 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400193 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
Steve French39da9842008-04-28 04:04:34 +0000195 /*
196 * PATH_MAX may be too long - it would presumably be total path,
197 * but note that some servers (includinng Samba 3) have a shorter
198 * maximum path.
199 *
200 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
201 */
202 buf->f_namelen = PATH_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 buf->f_files = 0; /* undefined */
204 buf->f_ffree = 0; /* unlimited */
205
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700206 if (server->ops->queryfs)
207 rc = server->ops->queryfs(xid, tcon, buf);
Steve French39da9842008-04-28 04:04:34 +0000208
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400209 free_xid(xid);
Steve French39da9842008-04-28 04:04:34 +0000210 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211}
212
Steve French31742c52014-08-17 08:38:47 -0500213static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
214{
Al Viro7119e222014-10-22 00:25:12 -0400215 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
Steve French31742c52014-08-17 08:38:47 -0500216 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
217 struct TCP_Server_Info *server = tcon->ses->server;
218
219 if (server->ops->fallocate)
220 return server->ops->fallocate(file, tcon, mode, off, len);
221
222 return -EOPNOTSUPP;
223}
224
Al Viro10556cb2011-06-20 19:28:19 -0400225static int cifs_permission(struct inode *inode, int mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226{
227 struct cifs_sb_info *cifs_sb;
228
229 cifs_sb = CIFS_SB(inode->i_sb);
230
Miklos Szeredif696a362008-07-31 13:41:58 +0200231 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
232 if ((mask & MAY_EXEC) && !execute_ok(inode))
233 return -EACCES;
234 else
235 return 0;
236 } else /* file mode might have been restricted at mount time
Steve French50c2f752007-07-13 00:33:32 +0000237 on the client (above and beyond ACL on servers) for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 servers which do not support setting and viewing mode bits,
Steve French50c2f752007-07-13 00:33:32 +0000239 so allowing client to check permissions is useful */
Al Viro2830ba72011-06-20 19:16:29 -0400240 return generic_permission(inode, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241}
242
Christoph Lametere18b8902006-12-06 20:33:20 -0800243static struct kmem_cache *cifs_inode_cachep;
244static struct kmem_cache *cifs_req_cachep;
245static struct kmem_cache *cifs_mid_cachep;
Christoph Lametere18b8902006-12-06 20:33:20 -0800246static struct kmem_cache *cifs_sm_req_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247mempool_t *cifs_sm_req_poolp;
248mempool_t *cifs_req_poolp;
249mempool_t *cifs_mid_poolp;
250
251static struct inode *
252cifs_alloc_inode(struct super_block *sb)
253{
254 struct cifsInodeInfo *cifs_inode;
Christoph Lametere94b1762006-12-06 20:33:17 -0800255 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 if (!cifs_inode)
257 return NULL;
258 cifs_inode->cifsAttrs = 0x20; /* default */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 cifs_inode->time = 0;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700260 /*
261 * Until the file is open and we have gotten oplock info back from the
262 * server, can not assume caching of file data or metadata.
263 */
Pavel Shilovskyc6723622010-11-03 10:58:57 +0300264 cifs_set_oplock_level(cifs_inode, 0);
Jeff Laytonaff8d5c2014-04-30 09:31:45 -0400265 cifs_inode->flags = 0;
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000266 spin_lock_init(&cifs_inode->writers_lock);
267 cifs_inode->writers = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400269 cifs_inode->server_eof = 0;
Jeff Layton20054bd2011-01-07 11:30:27 -0500270 cifs_inode->uniqueid = 0;
271 cifs_inode->createtime = 0;
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400272 cifs_inode->epoch = 0;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700273#ifdef CONFIG_CIFS_SMB2
274 get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE);
275#endif
276 /*
277 * Can not set i_flags here - they get immediately overwritten to zero
278 * by the VFS.
279 */
280 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 INIT_LIST_HEAD(&cifs_inode->openFileList);
Pavel Shilovskyf45d3412012-09-19 06:22:43 -0700282 INIT_LIST_HEAD(&cifs_inode->llist);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 return &cifs_inode->vfs_inode;
284}
285
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100286static void cifs_i_callback(struct rcu_head *head)
287{
288 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100289 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
290}
291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292static void
293cifs_destroy_inode(struct inode *inode)
294{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100295 call_rcu(&inode->i_rcu, cifs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296}
297
Jeff Layton61f98ff2009-06-11 10:27:32 -0400298static void
Al Virob57922d2010-06-07 14:34:48 -0400299cifs_evict_inode(struct inode *inode)
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530300{
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700301 truncate_inode_pages_final(&inode->i_data);
Jan Karadbd57682012-05-03 14:48:02 +0200302 clear_inode(inode);
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530303 cifs_fscache_release_inode_cookie(inode);
304}
305
306static void
Jeff Layton61f98ff2009-06-11 10:27:32 -0400307cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
308{
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300309 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
310 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
311
Fabian Frederick571d5972014-05-13 18:04:17 +0200312 seq_puts(s, ",addr=");
Jeff Layton61f98ff2009-06-11 10:27:32 -0400313
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300314 switch (server->dstaddr.ss_family) {
Jeff Layton61f98ff2009-06-11 10:27:32 -0400315 case AF_INET:
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300316 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
Jeff Layton61f98ff2009-06-11 10:27:32 -0400317 break;
318 case AF_INET6:
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300319 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
320 if (sa6->sin6_scope_id)
321 seq_printf(s, "%%%u", sa6->sin6_scope_id);
Jeff Layton61f98ff2009-06-11 10:27:32 -0400322 break;
323 default:
Fabian Frederick571d5972014-05-13 18:04:17 +0200324 seq_puts(s, "(unknown)");
Jeff Layton61f98ff2009-06-11 10:27:32 -0400325 }
326}
327
Jeff Layton3e715512011-06-13 11:50:41 -0400328static void
Jeff Layton28e11bd2013-05-26 07:01:00 -0400329cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
Jeff Layton3e715512011-06-13 11:50:41 -0400330{
Steve Frencheda21162015-09-11 19:24:19 -0500331 if (ses->sectype == Unspecified) {
332 if (ses->user_name == NULL)
333 seq_puts(s, ",sec=none");
Jeff Layton28e11bd2013-05-26 07:01:00 -0400334 return;
Steve Frencheda21162015-09-11 19:24:19 -0500335 }
Jeff Layton28e11bd2013-05-26 07:01:00 -0400336
Fabian Frederick571d5972014-05-13 18:04:17 +0200337 seq_puts(s, ",sec=");
Jeff Layton3e715512011-06-13 11:50:41 -0400338
Jeff Layton28e11bd2013-05-26 07:01:00 -0400339 switch (ses->sectype) {
Jeff Layton3e715512011-06-13 11:50:41 -0400340 case LANMAN:
Fabian Frederick571d5972014-05-13 18:04:17 +0200341 seq_puts(s, "lanman");
Jeff Layton3e715512011-06-13 11:50:41 -0400342 break;
343 case NTLMv2:
Fabian Frederick571d5972014-05-13 18:04:17 +0200344 seq_puts(s, "ntlmv2");
Jeff Layton3e715512011-06-13 11:50:41 -0400345 break;
346 case NTLM:
Fabian Frederick571d5972014-05-13 18:04:17 +0200347 seq_puts(s, "ntlm");
Jeff Layton3e715512011-06-13 11:50:41 -0400348 break;
349 case Kerberos:
Fabian Frederick571d5972014-05-13 18:04:17 +0200350 seq_puts(s, "krb5");
Jeff Layton3e715512011-06-13 11:50:41 -0400351 break;
352 case RawNTLMSSP:
Fabian Frederick571d5972014-05-13 18:04:17 +0200353 seq_puts(s, "ntlmssp");
Jeff Layton3e715512011-06-13 11:50:41 -0400354 break;
355 default:
356 /* shouldn't ever happen */
Fabian Frederick571d5972014-05-13 18:04:17 +0200357 seq_puts(s, "unknown");
Jeff Layton3e715512011-06-13 11:50:41 -0400358 break;
359 }
360
Jeff Layton28e11bd2013-05-26 07:01:00 -0400361 if (ses->sign)
Fabian Frederick571d5972014-05-13 18:04:17 +0200362 seq_puts(s, "i");
Jeff Layton3e715512011-06-13 11:50:41 -0400363}
364
Jeff Laytond06b5052012-05-16 07:53:01 -0400365static void
366cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
367{
Fabian Frederick571d5972014-05-13 18:04:17 +0200368 seq_puts(s, ",cache=");
Jeff Laytond06b5052012-05-16 07:53:01 -0400369
370 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
Fabian Frederick571d5972014-05-13 18:04:17 +0200371 seq_puts(s, "strict");
Jeff Laytond06b5052012-05-16 07:53:01 -0400372 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
Fabian Frederick571d5972014-05-13 18:04:17 +0200373 seq_puts(s, "none");
Jeff Laytond06b5052012-05-16 07:53:01 -0400374 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200375 seq_puts(s, "loose");
Jeff Laytond06b5052012-05-16 07:53:01 -0400376}
377
Jeff Layton3ae35cd2013-07-30 13:34:40 -0400378static void
379cifs_show_nls(struct seq_file *s, struct nls_table *cur)
380{
381 struct nls_table *def;
382
383 /* Display iocharset= option if it's not default charset */
384 def = load_nls_default();
385 if (def != cur)
386 seq_printf(s, ",iocharset=%s", cur->charset);
387 unload_nls(def);
388}
389
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390/*
391 * cifs_show_options() is for displaying mount options in /proc/mounts.
392 * Not all settable options are displayed but most of the important
393 * ones are.
394 */
395static int
Al Viro34c80b12011-12-08 21:32:45 -0500396cifs_show_options(struct seq_file *s, struct dentry *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397{
Al Viro34c80b12011-12-08 21:32:45 -0500398 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
Steve French96daf2b2011-05-27 04:34:02 +0000399 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
Ben Greear3eb9a882010-09-01 17:06:02 -0700400 struct sockaddr *srcaddr;
401 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
Kees Cooka068acf2015-09-04 15:44:57 -0700403 seq_show_option(s, "vers", tcon->ses->server->vals->version_string);
Jeff Layton28e11bd2013-05-26 07:01:00 -0400404 cifs_show_security(s, tcon->ses);
Jeff Laytond06b5052012-05-16 07:53:01 -0400405 cifs_show_cache_flavor(s, cifs_sb);
Jeff Layton3e715512011-06-13 11:50:41 -0400406
Jeff Layton29e07c82010-09-29 19:51:12 -0400407 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
Fabian Frederick571d5972014-05-13 18:04:17 +0200408 seq_puts(s, ",multiuser");
Steve French8727c8a2011-02-25 01:11:56 -0600409 else if (tcon->ses->user_name)
Kees Cooka068acf2015-09-04 15:44:57 -0700410 seq_show_option(s, "username", tcon->ses->user_name);
Jeff Layton29e07c82010-09-29 19:51:12 -0400411
Jeff Layton8616e0f2009-06-11 10:27:28 -0400412 if (tcon->ses->domainName)
Kees Cooka068acf2015-09-04 15:44:57 -0700413 seq_show_option(s, "domain", tcon->ses->domainName);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400414
Ben Greear3eb9a882010-09-01 17:06:02 -0700415 if (srcaddr->sa_family != AF_UNSPEC) {
416 struct sockaddr_in *saddr4;
417 struct sockaddr_in6 *saddr6;
418 saddr4 = (struct sockaddr_in *)srcaddr;
419 saddr6 = (struct sockaddr_in6 *)srcaddr;
420 if (srcaddr->sa_family == AF_INET6)
421 seq_printf(s, ",srcaddr=%pI6c",
422 &saddr6->sin6_addr);
423 else if (srcaddr->sa_family == AF_INET)
424 seq_printf(s, ",srcaddr=%pI4",
425 &saddr4->sin_addr.s_addr);
426 else
427 seq_printf(s, ",srcaddr=BAD-AF:%i",
428 (int)(srcaddr->sa_family));
429 }
430
Eric W. Biederman1f682332013-02-06 01:20:20 -0800431 seq_printf(s, ",uid=%u",
432 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
Jeff Layton340481a32009-06-11 10:27:29 -0400433 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
Fabian Frederick571d5972014-05-13 18:04:17 +0200434 seq_puts(s, ",forceuid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400435 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200436 seq_puts(s, ",noforceuid");
Jeff Layton340481a32009-06-11 10:27:29 -0400437
Eric W. Biederman1f682332013-02-06 01:20:20 -0800438 seq_printf(s, ",gid=%u",
439 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
Jeff Layton340481a32009-06-11 10:27:29 -0400440 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
Fabian Frederick571d5972014-05-13 18:04:17 +0200441 seq_puts(s, ",forcegid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400442 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200443 seq_puts(s, ",noforcegid");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400444
Jeff Layton61f98ff2009-06-11 10:27:32 -0400445 cifs_show_address(s, tcon->ses->server);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400446
447 if (!tcon->unix_ext)
Al Viro5206efd2011-07-26 03:22:14 -0400448 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
Steve French2b280fa2008-05-17 03:12:45 +0000449 cifs_sb->mnt_file_mode,
450 cifs_sb->mnt_dir_mode);
Jeff Layton3ae35cd2013-07-30 13:34:40 -0400451
452 cifs_show_nls(s, cifs_sb->local_nls);
453
Jeff Layton8616e0f2009-06-11 10:27:28 -0400454 if (tcon->seal)
Fabian Frederick571d5972014-05-13 18:04:17 +0200455 seq_puts(s, ",seal");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400456 if (tcon->nocase)
Fabian Frederick571d5972014-05-13 18:04:17 +0200457 seq_puts(s, ",nocase");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400458 if (tcon->retry)
Fabian Frederick571d5972014-05-13 18:04:17 +0200459 seq_puts(s, ",hard");
Steve Frenchf16dfa72015-09-30 21:07:59 -0500460 if (tcon->use_persistent)
461 seq_puts(s, ",persistenthandles");
Steve French592fafe2015-11-03 10:08:53 -0600462 else if (tcon->use_resilient)
463 seq_puts(s, ",resilienthandles");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000464 if (tcon->unix_ext)
Fabian Frederick571d5972014-05-13 18:04:17 +0200465 seq_puts(s, ",unix");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000466 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200467 seq_puts(s, ",nounix");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400468 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
Fabian Frederick571d5972014-05-13 18:04:17 +0200469 seq_puts(s, ",posixpaths");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400470 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
Fabian Frederick571d5972014-05-13 18:04:17 +0200471 seq_puts(s, ",setuids");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400472 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200473 seq_puts(s, ",serverino");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000474 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
Fabian Frederick571d5972014-05-13 18:04:17 +0200475 seq_puts(s, ",rwpidforward");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000476 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200477 seq_puts(s, ",forcemand");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
Fabian Frederick571d5972014-05-13 18:04:17 +0200479 seq_puts(s, ",nouser_xattr");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400480 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
Fabian Frederick571d5972014-05-13 18:04:17 +0200481 seq_puts(s, ",mapchars");
Nakajima Akirabc8ebdc42015-02-13 15:35:58 +0900482 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
483 seq_puts(s, ",mapposix");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400484 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200485 seq_puts(s, ",sfu");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400486 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200487 seq_puts(s, ",nobrl");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400488 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200489 seq_puts(s, ",cifsacl");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400490 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200491 seq_puts(s, ",dynperm");
Al Viro34c80b12011-12-08 21:32:45 -0500492 if (root->d_sb->s_flags & MS_POSIXACL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200493 seq_puts(s, ",acl");
Stefan Metzmacher736a3322010-07-30 14:56:00 +0200494 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
Fabian Frederick571d5972014-05-13 18:04:17 +0200495 seq_puts(s, ",mfsymlinks");
Suresh Jayaraman476428f2010-11-24 17:49:07 +0530496 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
Fabian Frederick571d5972014-05-13 18:04:17 +0200497 seq_puts(s, ",fsc");
Steve French71c424b2011-10-19 20:44:48 -0500498 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
Fabian Frederick571d5972014-05-13 18:04:17 +0200499 seq_puts(s, ",nostrictsync");
Steve French71c424b2011-10-19 20:44:48 -0500500 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200501 seq_puts(s, ",noperm");
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100502 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
Eric W. Biederman1f682332013-02-06 01:20:20 -0800503 seq_printf(s, ",backupuid=%u",
504 from_kuid_munged(&init_user_ns,
505 cifs_sb->mnt_backupuid));
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100506 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
Eric W. Biederman1f682332013-02-06 01:20:20 -0800507 seq_printf(s, ",backupgid=%u",
508 from_kgid_munged(&init_user_ns,
509 cifs_sb->mnt_backupgid));
Steve French2b280fa2008-05-17 03:12:45 +0000510
Sachin Prabhu28f88812012-04-24 15:28:30 +0100511 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
512 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
Steve Frenchadfeb3e2015-12-18 12:31:36 -0600513 seq_printf(s, ",echo_interval=%lu",
514 tcon->ses->server->echo_interval / HZ);
Suresh Jayaraman6d20e842010-12-01 14:42:28 +0530515 /* convert actimeo and display it in seconds */
Sachin Prabhu156d1792012-04-25 12:10:14 +0100516 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 return 0;
519}
520
Al Viro42faad92008-04-24 07:21:56 -0400521static void cifs_umount_begin(struct super_block *sb)
Steve French68058e72005-10-10 10:34:22 -0700522{
Al Viro42faad92008-04-24 07:21:56 -0400523 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French96daf2b2011-05-27 04:34:02 +0000524 struct cifs_tcon *tcon;
Steve French68058e72005-10-10 10:34:22 -0700525
Steve French4523cc32007-04-30 20:13:06 +0000526 if (cifs_sb == NULL)
Steve French9e2e85f2005-10-10 14:28:38 -0700527 return;
528
Jeff Layton0d424ad2010-09-20 16:01:35 -0700529 tcon = cifs_sb_master_tcon(cifs_sb);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500530
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530531 spin_lock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000532 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
533 /* we have other mounts to same share or we have
534 already tried to force umount this and woken up
535 all waiting network requests, nothing to do */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530536 spin_unlock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000537 return;
538 } else if (tcon->tc_count == 1)
Steve French5e1253b2005-10-10 14:06:37 -0700539 tcon->tidStatus = CifsExiting;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530540 spin_unlock(&cifs_tcp_ses_lock);
Steve French5e1253b2005-10-10 14:06:37 -0700541
Steve French3a5ff612006-07-14 22:37:11 +0000542 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
Steve French7b7abfe2005-11-09 15:21:09 -0800543 /* cancel_notify_requests(tcon); */
Steve French50c2f752007-07-13 00:33:32 +0000544 if (tcon->ses && tcon->ses->server) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500545 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
Steve French9e2e85f2005-10-10 14:28:38 -0700546 wake_up_all(&tcon->ses->server->request_q);
Steve French6ab16d22005-11-29 20:55:11 -0800547 wake_up_all(&tcon->ses->server->response_q);
548 msleep(1); /* yield */
549 /* we have to kick the requests once more */
550 wake_up_all(&tcon->ses->server->response_q);
551 msleep(1);
Steve French5e1253b2005-10-10 14:06:37 -0700552 }
Steve French68058e72005-10-10 10:34:22 -0700553
554 return;
555}
Steve French68058e72005-10-10 10:34:22 -0700556
Steve Frenchbf97d282006-09-28 21:34:06 +0000557#ifdef CONFIG_CIFS_STATS2
Al Viro64132372011-12-08 20:51:13 -0500558static int cifs_show_stats(struct seq_file *s, struct dentry *root)
Steve Frenchbf97d282006-09-28 21:34:06 +0000559{
560 /* BB FIXME */
561 return 0;
562}
563#endif
564
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565static int cifs_remount(struct super_block *sb, int *flags, char *data)
566{
Theodore Ts'o02b99842014-03-13 10:14:33 -0400567 sync_filesystem(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 *flags |= MS_NODIRATIME;
569 return 0;
570}
571
Al Viro45321ac2010-06-07 13:43:19 -0400572static int cifs_drop_inode(struct inode *inode)
Jeff Layton12420ac2010-06-01 14:47:40 -0400573{
574 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
575
Al Viro45321ac2010-06-07 13:43:19 -0400576 /* no serverino => unconditional eviction */
577 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
578 generic_drop_inode(inode);
Jeff Layton12420ac2010-06-01 14:47:40 -0400579}
580
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800581static const struct super_operations cifs_super_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 .statfs = cifs_statfs,
583 .alloc_inode = cifs_alloc_inode,
584 .destroy_inode = cifs_destroy_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400585 .drop_inode = cifs_drop_inode,
Al Virob57922d2010-06-07 14:34:48 -0400586 .evict_inode = cifs_evict_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400587/* .delete_inode = cifs_delete_inode, */ /* Do not need above
588 function unless later we add lazy close of inodes or unless the
Steve French50c2f752007-07-13 00:33:32 +0000589 kernel forgets to call us with the same number of releases (closes)
590 as opens */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 .show_options = cifs_show_options,
Steve French7b7abfe2005-11-09 15:21:09 -0800592 .umount_begin = cifs_umount_begin,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 .remount_fs = cifs_remount,
Steve Frenchbf97d282006-09-28 21:34:06 +0000594#ifdef CONFIG_CIFS_STATS2
Steve Frenchf46d3e12006-09-30 01:08:55 +0000595 .show_stats = cifs_show_stats,
Steve Frenchbf97d282006-09-28 21:34:06 +0000596#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597};
598
Steve Frenchf87d39d2011-05-27 03:50:55 +0000599/*
600 * Get root dentry from superblock according to prefix path mount option.
601 * Return dentry with refcount + 1 on success and NULL otherwise.
602 */
603static struct dentry *
604cifs_get_root(struct smb_vol *vol, struct super_block *sb)
605{
Al Virofec11dd2011-07-18 13:50:40 -0400606 struct dentry *dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000607 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Al Virofec11dd2011-07-18 13:50:40 -0400608 char *full_path = NULL;
609 char *s, *p;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000610 char sep;
611
Sachin Prabhu348c1bf2016-07-29 22:38:21 +0100612 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
613 return dget(sb->s_root);
614
Steve French6d3ea7e2012-11-28 22:34:41 -0600615 full_path = cifs_build_path_to_root(vol, cifs_sb,
616 cifs_sb_master_tcon(cifs_sb));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000617 if (full_path == NULL)
Al Viro9403c9c2011-06-17 10:02:59 -0400618 return ERR_PTR(-ENOMEM);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000619
Joe Perchesf96637b2013-05-04 22:12:25 -0500620 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000621
Steve Frenchf87d39d2011-05-27 03:50:55 +0000622 sep = CIFS_DIR_SEP(cifs_sb);
Al Virofec11dd2011-07-18 13:50:40 -0400623 dentry = dget(sb->s_root);
624 p = s = full_path;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000625
Al Virofec11dd2011-07-18 13:50:40 -0400626 do {
David Howells2b0143b2015-03-17 22:25:59 +0000627 struct inode *dir = d_inode(dentry);
Al Virofec11dd2011-07-18 13:50:40 -0400628 struct dentry *child;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000629
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400630 if (!dir) {
631 dput(dentry);
632 dentry = ERR_PTR(-ENOENT);
633 break;
634 }
Jeff Laytonce2ac522013-02-01 15:11:01 -0500635 if (!S_ISDIR(dir->i_mode)) {
636 dput(dentry);
637 dentry = ERR_PTR(-ENOTDIR);
638 break;
639 }
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400640
Al Virofec11dd2011-07-18 13:50:40 -0400641 /* skip separators */
642 while (*s == sep)
643 s++;
644 if (!*s)
645 break;
646 p = s++;
647 /* next separator */
648 while (*s && *s != sep)
649 s++;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000650
Al Viro85f40482016-03-07 23:20:44 -0500651 child = lookup_one_len_unlocked(p, dentry, s - p);
Al Virofec11dd2011-07-18 13:50:40 -0400652 dput(dentry);
653 dentry = child;
654 } while (!IS_ERR(dentry));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000655 kfree(full_path);
Al Virofec11dd2011-07-18 13:50:40 -0400656 return dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000657}
658
Al Viroee01a142011-06-17 09:47:23 -0400659static int cifs_set_super(struct super_block *sb, void *data)
660{
661 struct cifs_mnt_data *mnt_data = data;
662 sb->s_fs_info = mnt_data->cifs_sb;
663 return set_anon_super(sb, NULL);
664}
665
Al Virod753ed92010-07-26 12:52:33 +0400666static struct dentry *
667cifs_do_mount(struct file_system_type *fs_type,
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000668 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669{
670 int rc;
Jan Blunckdb719222010-08-15 22:51:10 +0200671 struct super_block *sb;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000672 struct cifs_sb_info *cifs_sb;
673 struct smb_vol *volume_info;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400674 struct cifs_mnt_data mnt_data;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000675 struct dentry *root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
Joe Perchesf96637b2013-05-04 22:12:25 -0500677 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Jeff Layton04db79b2011-07-06 08:10:38 -0400679 volume_info = cifs_get_volume_info((char *)data, dev_name);
680 if (IS_ERR(volume_info))
681 return ERR_CAST(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000682
683 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
684 if (cifs_sb == NULL) {
685 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400686 goto out_nls;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000687 }
688
Al Viro5d3bc602011-06-17 09:17:28 -0400689 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
690 if (cifs_sb->mountdata == NULL) {
691 root = ERR_PTR(-ENOMEM);
Sachin Prabhu4214ebf2016-07-29 22:38:19 +0100692 goto out_free;
Al Viro5d3bc602011-06-17 09:17:28 -0400693 }
694
Sachin Prabhu4214ebf2016-07-29 22:38:19 +0100695 rc = cifs_setup_cifs_sb(volume_info, cifs_sb);
696 if (rc) {
697 root = ERR_PTR(rc);
698 goto out_free;
Aurelien Aptela6b50582016-05-25 19:59:09 +0200699 }
700
Al Viro97d11522011-06-17 09:29:57 -0400701 rc = cifs_mount(cifs_sb, volume_info);
702 if (rc) {
703 if (!(flags & MS_SILENT))
Joe Perchesf96637b2013-05-04 22:12:25 -0500704 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
705 rc);
Al Viro97d11522011-06-17 09:29:57 -0400706 root = ERR_PTR(rc);
Sachin Prabhu4214ebf2016-07-29 22:38:19 +0100707 goto out_free;
Al Viro97d11522011-06-17 09:29:57 -0400708 }
709
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400710 mnt_data.vol = volume_info;
711 mnt_data.cifs_sb = cifs_sb;
712 mnt_data.flags = flags;
713
David Howells9249e172012-06-25 12:55:37 +0100714 /* BB should we make this contingent on mount parm? */
715 flags |= MS_NODIRATIME | MS_NOATIME;
716
717 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000718 if (IS_ERR(sb)) {
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000719 root = ERR_CAST(sb);
Al Viro97d11522011-06-17 09:29:57 -0400720 cifs_umount(cifs_sb);
Al Virod757d712011-06-17 09:42:43 -0400721 goto out;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000722 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Al Viroee01a142011-06-17 09:47:23 -0400724 if (sb->s_root) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500725 cifs_dbg(FYI, "Use existing superblock\n");
Al Viro97d11522011-06-17 09:29:57 -0400726 cifs_umount(cifs_sb);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400727 } else {
Al Viro5c4f1ad2011-06-17 09:56:55 -0400728 rc = cifs_read_super(sb);
729 if (rc) {
730 root = ERR_PTR(rc);
731 goto out_super;
732 }
733
734 sb->s_flags |= MS_ACTIVE;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400735 }
736
Sachin Prabhu348c1bf2016-07-29 22:38:21 +0100737 root = cifs_get_root(volume_info, sb);
Al Viro9403c9c2011-06-17 10:02:59 -0400738 if (IS_ERR(root))
Al Virofa18f1b2011-06-17 09:50:44 -0400739 goto out_super;
Al Virofa18f1b2011-06-17 09:50:44 -0400740
Joe Perchesf96637b2013-05-04 22:12:25 -0500741 cifs_dbg(FYI, "dentry root is: %p\n", root);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400742 goto out;
743
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400744out_super:
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400745 deactivate_locked_super(sb);
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400746out:
Jeff Laytonf9e59bc2011-07-06 08:10:37 -0400747 cifs_cleanup_volume_info(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000748 return root;
Al Viro5c4f1ad2011-06-17 09:56:55 -0400749
Sachin Prabhu4214ebf2016-07-29 22:38:19 +0100750out_free:
751 kfree(cifs_sb->prepath);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400752 kfree(cifs_sb->mountdata);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400753 kfree(cifs_sb);
754out_nls:
755 unload_nls(volume_info->local_nls);
756 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757}
758
Jeff Layton08bc0352014-05-23 06:50:21 -0400759static ssize_t
760cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
761{
762 ssize_t rc;
763 struct inode *inode = file_inode(iocb->ki_filp);
764
Ross Lagerwall882137c2015-12-02 14:46:07 +0000765 if (iocb->ki_filp->f_flags & O_DIRECT)
766 return cifs_user_readv(iocb, iter);
767
Jeff Layton08bc0352014-05-23 06:50:21 -0400768 rc = cifs_revalidate_mapping(inode);
769 if (rc)
770 return rc;
771
772 return generic_file_read_iter(iocb, iter);
773}
774
Al Viro3dae8752014-04-03 12:05:17 -0400775static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
Steve French87c89dd2005-11-17 17:03:00 -0800776{
Al Viro496ad9a2013-01-23 17:07:38 -0500777 struct inode *inode = file_inode(iocb->ki_filp);
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000778 struct cifsInodeInfo *cinode = CIFS_I(inode);
Steve French87c89dd2005-11-17 17:03:00 -0800779 ssize_t written;
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500780 int rc;
Steve French87c89dd2005-11-17 17:03:00 -0800781
Ross Lagerwall882137c2015-12-02 14:46:07 +0000782 if (iocb->ki_filp->f_flags & O_DIRECT) {
783 written = cifs_user_writev(iocb, from);
784 if (written > 0 && CIFS_CACHE_READ(cinode)) {
785 cifs_zap_mapping(inode);
786 cifs_dbg(FYI,
787 "Set no oplock for inode=%p after a write operation\n",
788 inode);
789 cinode->oplock = 0;
790 }
791 return written;
792 }
793
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000794 written = cifs_get_writer(cinode);
795 if (written)
796 return written;
797
Al Viro3dae8752014-04-03 12:05:17 -0400798 written = generic_file_write_iter(iocb, from);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500799
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400800 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000801 goto out;
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500802
803 rc = filemap_fdatawrite(inode->i_mapping);
804 if (rc)
Al Viro3dae8752014-04-03 12:05:17 -0400805 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
Joe Perchesf96637b2013-05-04 22:12:25 -0500806 rc, inode);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500807
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000808out:
809 cifs_put_writer(cinode);
Steve French87c89dd2005-11-17 17:03:00 -0800810 return written;
811}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Andrew Morton965c8e52012-12-17 15:59:39 -0800813static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
Steve Frenchc32a0b62006-01-12 14:41:28 -0800814{
Josef Bacik06222e42011-07-18 13:21:38 -0400815 /*
Andrew Morton965c8e52012-12-17 15:59:39 -0800816 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
Josef Bacik06222e42011-07-18 13:21:38 -0400817 * the cached file length
818 */
Andrew Morton965c8e52012-12-17 15:59:39 -0800819 if (whence != SEEK_SET && whence != SEEK_CUR) {
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400820 int rc;
Al Viro496ad9a2013-01-23 17:07:38 -0500821 struct inode *inode = file_inode(file);
Steve French030e9d82007-02-01 04:27:59 +0000822
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400823 /*
824 * We need to be sure that all dirty pages are written and the
825 * server has the newest file length.
826 */
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400827 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400828 inode->i_mapping->nrpages != 0) {
829 rc = filemap_fdatawait(inode->i_mapping);
Steve French156ecb22011-05-20 17:00:01 +0000830 if (rc) {
831 mapping_set_error(inode->i_mapping, rc);
832 return rc;
833 }
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400834 }
835 /*
836 * Some applications poll for the file length in this strange
837 * way so we must seek to end on non-oplocked files by
838 * setting the revalidate time to zero.
839 */
840 CIFS_I(inode)->time = 0;
Steve French030e9d82007-02-01 04:27:59 +0000841
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400842 rc = cifs_revalidate_file_attr(file);
843 if (rc < 0)
844 return (loff_t)rc;
Steve Frenchc32a0b62006-01-12 14:41:28 -0800845 }
Andrew Morton965c8e52012-12-17 15:59:39 -0800846 return generic_file_llseek(file, offset, whence);
Steve Frenchc32a0b62006-01-12 14:41:28 -0800847}
848
Jeff Laytone6f5c782014-08-22 10:40:25 -0400849static int
850cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
Steve French84210e92008-10-23 04:42:37 +0000851{
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400852 /*
853 * Note that this is called by vfs setlease with i_lock held to
854 * protect *lease from going away.
855 */
Al Viro496ad9a2013-01-23 17:07:38 -0500856 struct inode *inode = file_inode(file);
Jeff Laytonba00ba62010-09-20 16:01:31 -0700857 struct cifsFileInfo *cfile = file->private_data;
Steve French84210e92008-10-23 04:42:37 +0000858
859 if (!(S_ISREG(inode->i_mode)))
860 return -EINVAL;
861
Jeff Layton02440802014-08-09 10:16:44 -0400862 /* Check if file is oplocked if this is request for new lease */
863 if (arg == F_UNLCK ||
864 ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400865 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
Jeff Laytone6f5c782014-08-22 10:40:25 -0400866 return generic_setlease(file, arg, lease, priv);
Jeff Layton13cfb732010-09-29 19:51:11 -0400867 else if (tlink_tcon(cfile->tlink)->local_lease &&
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400868 !CIFS_CACHE_READ(CIFS_I(inode)))
869 /*
870 * If the server claims to support oplock on this file, then we
871 * still need to check oplock even if the local_lease mount
872 * option is set, but there are servers which do not support
873 * oplock for which this mount option may be useful if the user
874 * knows that the file won't be changed on the server by anyone
875 * else.
876 */
Jeff Laytone6f5c782014-08-22 10:40:25 -0400877 return generic_setlease(file, arg, lease, priv);
Christoph Hellwig51ee4b82010-10-31 08:35:10 -0400878 else
Steve French84210e92008-10-23 04:42:37 +0000879 return -EAGAIN;
880}
Steve French84210e92008-10-23 04:42:37 +0000881
Igor Mammedove6ab1582008-01-11 01:49:48 +0000882struct file_system_type cifs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 .owner = THIS_MODULE,
884 .name = "cifs",
Al Virod753ed92010-07-26 12:52:33 +0400885 .mount = cifs_do_mount,
Al Viro6d686172011-06-17 08:34:57 -0400886 .kill_sb = cifs_kill_sb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 /* .fs_flags */
888};
Eric W. Biederman3e64fe52013-03-11 07:05:42 -0700889MODULE_ALIAS_FS("cifs");
Arjan van de Ven754661f2007-02-12 00:55:38 -0800890const struct inode_operations cifs_dir_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 .create = cifs_create,
Miklos Szeredid2c12712012-06-05 15:10:23 +0200892 .atomic_open = cifs_atomic_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 .lookup = cifs_lookup,
894 .getattr = cifs_getattr,
895 .unlink = cifs_unlink,
896 .link = cifs_hardlink,
897 .mkdir = cifs_mkdir,
898 .rmdir = cifs_rmdir,
Miklos Szeredi7c33d592014-07-23 15:15:36 +0200899 .rename2 = cifs_rename2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 .permission = cifs_permission,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 .setattr = cifs_setattr,
902 .symlink = cifs_symlink,
903 .mknod = cifs_mknod,
Andreas Gruenbachera9ae0082016-04-22 12:11:38 +0200904 .setxattr = generic_setxattr,
905 .getxattr = generic_getxattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 .listxattr = cifs_listxattr,
Andreas Gruenbachera9ae0082016-04-22 12:11:38 +0200907 .removexattr = generic_removexattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908};
909
Arjan van de Ven754661f2007-02-12 00:55:38 -0800910const struct inode_operations cifs_file_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 .setattr = cifs_setattr,
Steve French48a77aa2016-05-18 20:48:32 -0500912 .getattr = cifs_getattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 .permission = cifs_permission,
Andreas Gruenbachera9ae0082016-04-22 12:11:38 +0200914 .setxattr = generic_setxattr,
915 .getxattr = generic_getxattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 .listxattr = cifs_listxattr,
Andreas Gruenbachera9ae0082016-04-22 12:11:38 +0200917 .removexattr = generic_removexattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918};
919
Arjan van de Ven754661f2007-02-12 00:55:38 -0800920const struct inode_operations cifs_symlink_inode_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000921 .readlink = generic_readlink,
Al Viro6b255392015-11-17 10:20:54 -0500922 .get_link = cifs_get_link,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 .permission = cifs_permission,
Andreas Gruenbachera9ae0082016-04-22 12:11:38 +0200924 .setxattr = generic_setxattr,
925 .getxattr = generic_getxattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 .listxattr = cifs_listxattr,
Andreas Gruenbachera9ae0082016-04-22 12:11:38 +0200927 .removexattr = generic_removexattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928};
929
Christoph Hellwig04b38d62015-12-03 12:59:50 +0100930static int cifs_clone_file_range(struct file *src_file, loff_t off,
931 struct file *dst_file, loff_t destoff, u64 len)
932{
933 struct inode *src_inode = file_inode(src_file);
934 struct inode *target_inode = file_inode(dst_file);
935 struct cifsFileInfo *smb_file_src = src_file->private_data;
936 struct cifsFileInfo *smb_file_target = dst_file->private_data;
Christoph Hellwig04b38d62015-12-03 12:59:50 +0100937 struct cifs_tcon *target_tcon = tlink_tcon(smb_file_target->tlink);
938 unsigned int xid;
939 int rc;
940
941 cifs_dbg(FYI, "clone range\n");
942
943 xid = get_xid();
944
945 if (!src_file->private_data || !dst_file->private_data) {
946 rc = -EBADF;
947 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
948 goto out;
949 }
950
951 /*
952 * Note: cifs case is easier than btrfs since server responsible for
953 * checks for proper open modes and file type and if it wants
954 * server could even support copy of range where source = target
955 */
956 lock_two_nondirectories(target_inode, src_inode);
957
958 if (len == 0)
959 len = src_inode->i_size - off;
960
961 cifs_dbg(FYI, "about to flush pages\n");
962 /* should we flush first and last page first */
963 truncate_inode_pages_range(&target_inode->i_data, destoff,
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300964 PAGE_ALIGN(destoff + len)-1);
Christoph Hellwig04b38d62015-12-03 12:59:50 +0100965
966 if (target_tcon->ses->server->ops->duplicate_extents)
967 rc = target_tcon->ses->server->ops->duplicate_extents(xid,
968 smb_file_src, smb_file_target, off, len, destoff);
969 else
970 rc = -EOPNOTSUPP;
971
972 /* force revalidate of size and timestamps of target file now
973 that target is updated on the server */
974 CIFS_I(target_inode)->time = 0;
Christoph Hellwig04b38d62015-12-03 12:59:50 +0100975 /* although unlocking in the reverse order from locking is not
976 strictly necessary here it is a little cleaner to be consistent */
977 unlock_two_nondirectories(src_inode, target_inode);
978out:
979 free_xid(xid);
980 return rc;
981}
982
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800983const struct file_operations cifs_file_ops = {
Jeff Layton08bc0352014-05-23 06:50:21 -0400984 .read_iter = cifs_loose_read_iter,
Al Viro3dae8752014-04-03 12:05:17 -0400985 .write_iter = cifs_file_write_iter,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 .open = cifs_open,
987 .release = cifs_close,
988 .lock = cifs_lock,
989 .fsync = cifs_fsync,
990 .flush = cifs_flush,
991 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200992 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800993 .llseek = cifs_llseek,
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000994 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig04b38d62015-12-03 12:59:50 +0100995 .clone_file_range = cifs_clone_file_range,
Steve French84210e92008-10-23 04:42:37 +0000996 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500997 .fallocate = cifs_fallocate,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998};
999
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001000const struct file_operations cifs_file_strict_ops = {
Al Viroe6a7bcb2014-04-02 19:53:36 -04001001 .read_iter = cifs_strict_readv,
Al Viro3dae8752014-04-03 12:05:17 -04001002 .write_iter = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001003 .open = cifs_open,
1004 .release = cifs_close,
1005 .lock = cifs_lock,
1006 .fsync = cifs_strict_fsync,
1007 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +03001008 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001009 .splice_read = generic_file_splice_read,
1010 .llseek = cifs_llseek,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001011 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig04b38d62015-12-03 12:59:50 +01001012 .clone_file_range = cifs_clone_file_range,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001013 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -05001014 .fallocate = cifs_fallocate,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001015};
1016
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -08001017const struct file_operations cifs_file_direct_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +03001018 /* BB reevaluate whether they can be done with directio, no cache */
Al Viroe6a7bcb2014-04-02 19:53:36 -04001019 .read_iter = cifs_user_readv,
Al Viro3dae8752014-04-03 12:05:17 -04001020 .write_iter = cifs_user_writev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 .open = cifs_open,
1022 .release = cifs_close,
1023 .lock = cifs_lock,
1024 .fsync = cifs_fsync,
1025 .flush = cifs_flush,
Steve Frencha994b8f2009-12-07 05:44:46 +00001026 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +02001027 .splice_read = generic_file_splice_read,
Steve Frenchf9ddcca2008-05-15 05:51:55 +00001028 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig04b38d62015-12-03 12:59:50 +01001029 .clone_file_range = cifs_clone_file_range,
Steve Frenchc32a0b62006-01-12 14:41:28 -08001030 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +00001031 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -05001032 .fallocate = cifs_fallocate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033};
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001034
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -08001035const struct file_operations cifs_file_nobrl_ops = {
Jeff Layton08bc0352014-05-23 06:50:21 -04001036 .read_iter = cifs_loose_read_iter,
Al Viro3dae8752014-04-03 12:05:17 -04001037 .write_iter = cifs_file_write_iter,
Steve French87c89dd2005-11-17 17:03:00 -08001038 .open = cifs_open,
1039 .release = cifs_close,
1040 .fsync = cifs_fsync,
1041 .flush = cifs_flush,
1042 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +02001043 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -08001044 .llseek = cifs_llseek,
Steve Frenchf9ddcca2008-05-15 05:51:55 +00001045 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig04b38d62015-12-03 12:59:50 +01001046 .clone_file_range = cifs_clone_file_range,
Steve French84210e92008-10-23 04:42:37 +00001047 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -05001048 .fallocate = cifs_fallocate,
Steve French8b94bcb2005-11-11 11:41:00 -08001049};
1050
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001051const struct file_operations cifs_file_strict_nobrl_ops = {
Al Viroe6a7bcb2014-04-02 19:53:36 -04001052 .read_iter = cifs_strict_readv,
Al Viro3dae8752014-04-03 12:05:17 -04001053 .write_iter = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001054 .open = cifs_open,
1055 .release = cifs_close,
1056 .fsync = cifs_strict_fsync,
1057 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +03001058 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001059 .splice_read = generic_file_splice_read,
1060 .llseek = cifs_llseek,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001061 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig04b38d62015-12-03 12:59:50 +01001062 .clone_file_range = cifs_clone_file_range,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001063 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -05001064 .fallocate = cifs_fallocate,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +03001065};
1066
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -08001067const struct file_operations cifs_file_direct_nobrl_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +03001068 /* BB reevaluate whether they can be done with directio, no cache */
Al Viroe6a7bcb2014-04-02 19:53:36 -04001069 .read_iter = cifs_user_readv,
Al Viro3dae8752014-04-03 12:05:17 -04001070 .write_iter = cifs_user_writev,
Steve French87c89dd2005-11-17 17:03:00 -08001071 .open = cifs_open,
1072 .release = cifs_close,
1073 .fsync = cifs_fsync,
1074 .flush = cifs_flush,
Pavel Shilovsky810627a02010-03-27 02:00:49 +00001075 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +02001076 .splice_read = generic_file_splice_read,
Steve Frenchf9ddcca2008-05-15 05:51:55 +00001077 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig04b38d62015-12-03 12:59:50 +01001078 .clone_file_range = cifs_clone_file_range,
Steve Frenchc32a0b62006-01-12 14:41:28 -08001079 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +00001080 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -05001081 .fallocate = cifs_fallocate,
Steve French8b94bcb2005-11-11 11:41:00 -08001082};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -08001084const struct file_operations cifs_dir_ops = {
Al Viro3125d262016-04-20 17:40:47 -04001085 .iterate_shared = cifs_readdir,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 .release = cifs_closedir,
1087 .read = generic_read_dir,
Steve Frenchf9ddcca2008-05-15 05:51:55 +00001088 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig04b38d62015-12-03 12:59:50 +01001089 .clone_file_range = cifs_clone_file_range,
Christoph Hellwig3222a3e2008-09-03 21:53:01 +02001090 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091};
1092
1093static void
Alexey Dobriyan51cc5062008-07-25 19:45:34 -07001094cifs_init_once(void *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095{
1096 struct cifsInodeInfo *cifsi = inode;
1097
Christoph Lametera35afb82007-05-16 22:10:57 -07001098 inode_init_once(&cifsi->vfs_inode);
Pavel Shilovsky1b4b55a2012-09-19 06:22:44 -07001099 init_rwsem(&cifsi->lock_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100}
1101
Fabian Frederick9ee108b2014-04-03 14:46:30 -07001102static int __init
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103cifs_init_inodecache(void)
1104{
1105 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
Steve French26f57362007-08-30 22:09:15 +00001106 sizeof(struct cifsInodeInfo),
Paul Jacksonfffb60f2006-03-24 03:16:06 -08001107 0, (SLAB_RECLAIM_ACCOUNT|
Vladimir Davydov5d097052016-01-14 15:18:21 -08001108 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
Paul Mundt20c2df82007-07-20 10:11:58 +09001109 cifs_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 if (cifs_inode_cachep == NULL)
1111 return -ENOMEM;
1112
1113 return 0;
1114}
1115
1116static void
1117cifs_destroy_inodecache(void)
1118{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +10001119 /*
1120 * Make sure all delayed rcu free inodes are flushed before we
1121 * destroy cache.
1122 */
1123 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001124 kmem_cache_destroy(cifs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125}
1126
1127static int
1128cifs_init_request_bufs(void)
1129{
Pavel Shilovsky3792c172012-01-12 22:40:50 +04001130 size_t max_hdr_size = MAX_CIFS_HDR_SIZE;
1131#ifdef CONFIG_CIFS_SMB2
1132 /*
1133 * SMB2 maximum header size is bigger than CIFS one - no problems to
1134 * allocate some more bytes for CIFS.
1135 */
1136 max_hdr_size = MAX_SMB2_HDR_SIZE;
1137#endif
Steve French4523cc32007-04-30 20:13:06 +00001138 if (CIFSMaxBufSize < 8192) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1140 Unicode path name has to fit in any SMB/CIFS path based frames */
1141 CIFSMaxBufSize = 8192;
1142 } else if (CIFSMaxBufSize > 1024*127) {
1143 CIFSMaxBufSize = 1024 * 127;
1144 } else {
1145 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1146 }
Joe Perchesf96637b2013-05-04 22:12:25 -05001147/*
1148 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1149 CIFSMaxBufSize, CIFSMaxBufSize);
1150*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 cifs_req_cachep = kmem_cache_create("cifs_request",
Pavel Shilovsky3792c172012-01-12 22:40:50 +04001152 CIFSMaxBufSize + max_hdr_size, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +09001153 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 if (cifs_req_cachep == NULL)
1155 return -ENOMEM;
1156
Steve French4523cc32007-04-30 20:13:06 +00001157 if (cifs_min_rcv < 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 cifs_min_rcv = 1;
1159 else if (cifs_min_rcv > 64) {
1160 cifs_min_rcv = 64;
Joe Perchesf96637b2013-05-04 22:12:25 -05001161 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 }
1163
Matthew Dobson93d23412006-03-26 01:37:50 -08001164 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1165 cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
Steve French4523cc32007-04-30 20:13:06 +00001167 if (cifs_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 kmem_cache_destroy(cifs_req_cachep);
1169 return -ENOMEM;
1170 }
Steve Frenchec637e32005-12-12 20:53:18 -08001171 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 almost all handle based requests (but not write response, nor is it
1173 sufficient for path based requests). A smaller size would have
Steve French50c2f752007-07-13 00:33:32 +00001174 been more efficient (compacting multiple slab items on one 4k page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 for the case in which debug was on, but this larger size allows
1176 more SMBs to use small buffer alloc and is still much more
Steve French6dc0f872007-07-06 23:13:06 +00001177 efficient to alloc 1 per page off the slab compared to 17K (5page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 alloc of large cifs buffers even when page debugging is on */
1179 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
Steve French6dc0f872007-07-06 23:13:06 +00001180 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +09001181 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 if (cifs_sm_req_cachep == NULL) {
1183 mempool_destroy(cifs_req_poolp);
1184 kmem_cache_destroy(cifs_req_cachep);
Steve French6dc0f872007-07-06 23:13:06 +00001185 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186 }
1187
Steve French4523cc32007-04-30 20:13:06 +00001188 if (cifs_min_small < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 cifs_min_small = 2;
1190 else if (cifs_min_small > 256) {
1191 cifs_min_small = 256;
Joe Perchesf96637b2013-05-04 22:12:25 -05001192 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 }
1194
Matthew Dobson93d23412006-03-26 01:37:50 -08001195 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1196 cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197
Steve French4523cc32007-04-30 20:13:06 +00001198 if (cifs_sm_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 mempool_destroy(cifs_req_poolp);
1200 kmem_cache_destroy(cifs_req_cachep);
1201 kmem_cache_destroy(cifs_sm_req_cachep);
1202 return -ENOMEM;
1203 }
1204
1205 return 0;
1206}
1207
1208static void
1209cifs_destroy_request_bufs(void)
1210{
1211 mempool_destroy(cifs_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001212 kmem_cache_destroy(cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 mempool_destroy(cifs_sm_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001214 kmem_cache_destroy(cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215}
1216
1217static int
1218cifs_init_mids(void)
1219{
1220 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
Steve French26f57362007-08-30 22:09:15 +00001221 sizeof(struct mid_q_entry), 0,
1222 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 if (cifs_mid_cachep == NULL)
1224 return -ENOMEM;
1225
Matthew Dobson93d23412006-03-26 01:37:50 -08001226 /* 3 is a reasonable minimum number of simultaneous operations */
1227 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
Steve French4523cc32007-04-30 20:13:06 +00001228 if (cifs_mid_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 kmem_cache_destroy(cifs_mid_cachep);
1230 return -ENOMEM;
1231 }
1232
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 return 0;
1234}
1235
1236static void
1237cifs_destroy_mids(void)
1238{
1239 mempool_destroy(cifs_mid_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001240 kmem_cache_destroy(cifs_mid_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241}
1242
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243static int __init
1244init_cifs(void)
1245{
1246 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 cifs_proc_init();
Jeff Laytone7ddee92008-11-14 13:44:38 -05001248 INIT_LIST_HEAD(&cifs_tcp_ses_list);
Steve French0eff0e22011-02-24 05:39:23 +00001249#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
Steve French4ca9c192005-10-10 19:52:13 -07001250 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1251 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
Steve French0eff0e22011-02-24 05:39:23 +00001252#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253/*
1254 * Initialize Global counters
1255 */
1256 atomic_set(&sesInfoAllocCount, 0);
1257 atomic_set(&tconInfoAllocCount, 0);
Steve French6dc0f872007-07-06 23:13:06 +00001258 atomic_set(&tcpSesAllocCount, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 atomic_set(&tcpSesReconnectCount, 0);
1260 atomic_set(&tconInfoReconnectCount, 0);
1261
1262 atomic_set(&bufAllocCount, 0);
Steve French4498eed52005-12-03 13:58:57 -08001263 atomic_set(&smBufAllocCount, 0);
1264#ifdef CONFIG_CIFS_STATS2
1265 atomic_set(&totBufAllocCount, 0);
1266 atomic_set(&totSmBufAllocCount, 0);
1267#endif /* CONFIG_CIFS_STATS2 */
1268
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 atomic_set(&midCount, 0);
1270 GlobalCurrentXid = 0;
1271 GlobalTotalActiveXid = 0;
1272 GlobalMaxActiveXid = 0;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301273 spin_lock_init(&cifs_tcp_ses_lock);
Jeff Layton44772882010-10-15 15:34:03 -04001274 spin_lock_init(&cifs_file_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 spin_lock_init(&GlobalMid_Lock);
1276
Jeff Layton3d224622016-05-24 06:27:44 -04001277 get_random_bytes(&cifs_lock_secret, sizeof(cifs_lock_secret));
1278
Steve French4523cc32007-04-30 20:13:06 +00001279 if (cifs_max_pending < 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 cifs_max_pending = 2;
Joe Perchesf96637b2013-05-04 22:12:25 -05001281 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
Pavel Shilovsky10b9b982012-03-20 12:55:09 +03001282 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1283 cifs_max_pending = CIFS_MAX_REQ;
Joe Perchesf96637b2013-05-04 22:12:25 -05001284 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1285 CIFS_MAX_REQ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 }
1287
Jeff Laytonda472fc2012-03-23 14:40:53 -04001288 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1289 if (!cifsiod_wq) {
1290 rc = -ENOMEM;
1291 goto out_clean_proc;
1292 }
1293
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301294 rc = cifs_fscache_register();
1295 if (rc)
Jeff Laytonda472fc2012-03-23 14:40:53 -04001296 goto out_destroy_wq;
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301297
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 rc = cifs_init_inodecache();
Steve French45af7a02006-04-21 22:52:25 +00001299 if (rc)
Steve Frenchd3bf5222010-09-22 19:15:36 +00001300 goto out_unreg_fscache;
Steve French45af7a02006-04-21 22:52:25 +00001301
1302 rc = cifs_init_mids();
1303 if (rc)
1304 goto out_destroy_inodecache;
1305
1306 rc = cifs_init_request_bufs();
1307 if (rc)
1308 goto out_destroy_mids;
1309
Jeff Layton84a15b92007-11-03 05:02:24 +00001310#ifdef CONFIG_CIFS_UPCALL
Sachin Prabhub74cb9a2016-05-17 18:20:13 -05001311 rc = init_cifs_spnego();
Jeff Layton84a15b92007-11-03 05:02:24 +00001312 if (rc)
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001313 goto out_destroy_request_bufs;
1314#endif /* CONFIG_CIFS_UPCALL */
1315
1316#ifdef CONFIG_CIFS_ACL
1317 rc = init_cifs_idmap();
1318 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001319 goto out_register_key_type;
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001320#endif /* CONFIG_CIFS_ACL */
1321
1322 rc = register_filesystem(&cifs_fs_type);
1323 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001324 goto out_init_cifs_idmap;
Steve French45af7a02006-04-21 22:52:25 +00001325
Steve French45af7a02006-04-21 22:52:25 +00001326 return 0;
1327
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001328out_init_cifs_idmap:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001329#ifdef CONFIG_CIFS_ACL
1330 exit_cifs_idmap();
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001331out_register_key_type:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001332#endif
1333#ifdef CONFIG_CIFS_UPCALL
Sachin Prabhub74cb9a2016-05-17 18:20:13 -05001334 exit_cifs_spnego();
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001335out_destroy_request_bufs:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001336#endif
Steve French45af7a02006-04-21 22:52:25 +00001337 cifs_destroy_request_bufs();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001338out_destroy_mids:
Steve French45af7a02006-04-21 22:52:25 +00001339 cifs_destroy_mids();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001340out_destroy_inodecache:
Steve French45af7a02006-04-21 22:52:25 +00001341 cifs_destroy_inodecache();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001342out_unreg_fscache:
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301343 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001344out_destroy_wq:
1345 destroy_workqueue(cifsiod_wq);
Steve Frenchd3bf5222010-09-22 19:15:36 +00001346out_clean_proc:
1347 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 return rc;
1349}
1350
1351static void __exit
1352exit_cifs(void)
1353{
Joe Perchesf96637b2013-05-04 22:12:25 -05001354 cifs_dbg(NOISY, "exit_cifs\n");
Jeff Layton3dd93302012-03-21 06:27:55 -04001355 unregister_filesystem(&cifs_fs_type);
Igor Mammedov78d31a32008-04-24 12:56:07 +04001356 cifs_dfs_release_automount_timer();
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001357#ifdef CONFIG_CIFS_ACL
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001358 exit_cifs_idmap();
1359#endif
Jeff Layton84a15b92007-11-03 05:02:24 +00001360#ifdef CONFIG_CIFS_UPCALL
1361 unregister_key_type(&cifs_spnego_key_type);
1362#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 cifs_destroy_request_bufs();
Jeff Layton3dd93302012-03-21 06:27:55 -04001364 cifs_destroy_mids();
1365 cifs_destroy_inodecache();
1366 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001367 destroy_workqueue(cifsiod_wq);
Jeff Layton3dd93302012-03-21 06:27:55 -04001368 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369}
1370
1371MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
Steve French6dc0f872007-07-06 23:13:06 +00001372MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373MODULE_DESCRIPTION
Steve French63135e02007-07-17 17:34:02 +00001374 ("VFS to access servers complying with the SNIA CIFS Specification "
1375 "e.g. Samba and Windows");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376MODULE_VERSION(CIFS_VERSION);
1377module_init(init_cifs)
1378module_exit(exit_cifs)